JP2020125587A - Steel pipe diameter conversion ring - Google Patents

Steel pipe diameter conversion ring Download PDF

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JP2020125587A
JP2020125587A JP2019016920A JP2019016920A JP2020125587A JP 2020125587 A JP2020125587 A JP 2020125587A JP 2019016920 A JP2019016920 A JP 2019016920A JP 2019016920 A JP2019016920 A JP 2019016920A JP 2020125587 A JP2020125587 A JP 2020125587A
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steel pipe
diameter
conversion ring
outer diameter
receiving end
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JP7184285B2 (en
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次男 板垣
Tsugio Itagaki
次男 板垣
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Abstract

To provide a steel pipe diameter conversion ring which can select the optimum steel pipe used as a steel pipe pile and a pile-like ground reinforcement body, out of steel pipes having a variety of steel pipe diameters and wall thicknesses in a tip part and in the vicinity of a pile head part, and which can easily align the central axes of steel pipes of different diameters concentrically (perform centering) in connection by welding, to achieve reduction in material cost, thereby providing a steel pipe pile and a pile-like ground reinforcement body whose cost is minimum.SOLUTION: A steel pipe diameter conversion ring includes: a first steel pipe receiving end part having a first outer diameter constituted so as to be engaged with an inner peripheral side of a steel pipe having a relatively small inner diameter, and a second steel pipe receiving end part having a second outer diameter constituted so as to be engaged with the inner peripheral side of the steel pipe having a relatively large inner diameter; and one or a plurality of seat parts provided so as to protrude from an outer surface in the middle of expanding from the first outer diameter to the second outer diameter, and constituted so as to function as a bit for drilling in the case where the steel pipe diameter conversion ring rotates axially.SELECTED DRAWING: Figure 2

Description

本発明は、鋼管杭や杭状地盤補強体として使われる鋼管について、長手方向の途中で鋼管径を変更したいときに使用する鋼管径変換リングに関するものである。 The present invention relates to a steel pipe diameter conversion ring used for changing the steel pipe diameter in the middle of the longitudinal direction of a steel pipe used as a steel pipe pile or a pile-like ground reinforcement.

軟弱地盤を補強するため、鋼管杭や杭状地盤補強体として鋼管が使用されている。鋼管径が大きい程、杭の極限鉛直支持力や杭頭の限界水平抵抗力には有効であることは知られているが杭径を大きくすることで鋼管コストが高くなる。鋼管コストを抑えつつ極限鉛直支持力や限界水平抵抗力を高めることが重要な課題であった。 Steel pipes are used as steel pipe piles and pile-like ground reinforcements to reinforce soft ground. It is known that the larger the steel pipe diameter is, the more effective it is for the ultimate vertical bearing capacity of the pile and the limit horizontal resistance of the pile head. However, increasing the pile diameter increases the steel pipe cost. It was an important issue to increase the ultimate vertical bearing capacity and the limit horizontal resistance while suppressing the steel pipe cost.

鋼管杭及び杭状地盤補強体の先端の極限支持力は、先端部の有効面積と先端部より下に１Ｄ、上に４Ｄの範囲のＮ値平均値の積によって求まる。（Ｄ：杭及び杭状地盤補強体鋼管の直径）また、限界水平抵抗力は、鋼管の断面係数が大きければ有利に作用することが知られている。 The ultimate bearing capacity of the tip of the steel pipe pile and the pile-like ground reinforcement is obtained by the product of the effective area of the tip and the average N value in the range of 1D below and 4D above the tip. (D: Diameter of Pile and Pile-like Ground Reinforcement Steel Pipe) Further, it is known that the limiting horizontal resistance force acts advantageously if the section modulus of the steel pipe is large.

しかし、鋼管杭や杭状地盤補強体として使われる鋼管径を変更できる方法は数例提案されているが、一つの部品で複数の杭径や肉厚を自由に選択ができ安価に結合する方法は、未だ確立されていない。 However, several methods have been proposed to change the diameter of steel pipes used as steel pipe piles and pile-like ground reinforcements, but it is possible to freely select multiple pile diameters and wall thicknesses with one component and combine them at low cost. Has not yet been established.

特開２０００−７３３６５号公報JP 2000-73365 A 特開２００３−１０５７５５号公報JP, 2003-105755, A 特開２００８−２５１５６号公報JP 2008-25156 A

本発明の目的は、鋼管杭や杭状地盤補強体として使われる鋼管を先端部や杭頭部近傍で、種々の鋼管径や肉厚から最適なものを選択可能とし、溶接による接続では、異径鋼管の中心軸を簡単に同心状に合わせる（センタリングする）ことのできる鋼管径変換リングを提供して、材料コストの削減を図り、コストミニマムな鋼管杭や杭状地盤補強体を提供することである。 An object of the present invention is to allow a steel pipe used as a steel pipe pile or a pile-like ground reinforcement body to be optimally selected from various steel pipe diameters and wall thicknesses in the vicinity of the tip end and the pile head, and in connection by welding, different To provide a steel pipe diameter conversion ring that allows the central axes of large diameter steel pipes to be easily and concentrically (centered), reduce material costs, and provide steel pipe piles and pile-like ground reinforcements with minimum cost. Is.

本発明に係る鋼管径変換リングは、長手方向に使用する鋼管の外径や肉厚の異なる鋼管を溶接接続できる構造である。この鋼管径変換リングは、該鋼管径変換リングの両端に異径の鋼管を溶接することができる構造であり、長手方向に対して取付け向きを拘束していないため、相対的に大きい内径を有する鋼管（以下、単に「大径鋼管」という。）から、相対的に小さい内径を有する鋼管（以下、単に「小径鋼管」という。）への変化と、小径鋼管から大径鋼管への変化が容易に可能な構造となっている。また、鋼管変更においては単一の鋼管径変換リング上で複数の小径鋼管の選択を可能にしている上に鋼管肉厚の制約もない。鋼管径変換リングに、必要数のコマ部を取り付けることにより、小径鋼管の回転圧入作業から大径鋼管の回転圧入作業へ変化する際にも、掘削用ビットとして機能し得るように構成されたコマ部の土壌撹拌効果により圧入スピードを維持し作業効率の低下を回避することができる。 The steel pipe diameter conversion ring according to the present invention has a structure capable of welding and connecting steel pipes having different outer diameters and wall thicknesses used in the longitudinal direction. This steel pipe diameter conversion ring has a structure in which steel pipes having different diameters can be welded to both ends of the steel pipe diameter conversion ring, and has a relatively large inner diameter because the mounting direction is not restricted with respect to the longitudinal direction. Easy to change from steel pipes (hereinafter simply referred to as "large diameter steel pipes") to steel pipes with relatively small inner diameters (hereinafter simply referred to as "small diameter steel pipes") and from small diameter steel pipes to large diameter steel pipes The structure is possible. Further, when changing the steel pipe, it is possible to select a plurality of small diameter steel pipes on a single steel pipe diameter conversion ring, and there is no restriction on the steel pipe wall thickness. By attaching the required number of pieces to the steel pipe diameter conversion ring, it is designed to function as an excavating bit when changing from rotary press-fitting work for small diameter steel pipes to rotary press-fitting work for large diameter steel pipes. Due to the soil agitation effect of the part, it is possible to maintain the press-fitting speed and avoid a decrease in work efficiency.

本発明の一実施例においては、鋼管径変換リングであって、相対的に小さい内径を有する鋼管の内周側と係合可能に構成された第１の外径を有する第１の鋼管受け端部、及び相対的に大きい内径を有する鋼管の内周側と係合可能に構成された第２の外径を有する第２の鋼管受け端部と、第１の外径から第２の外径まで拡大する途中の外面から突出するように設けられ、該鋼管径変換リングが軸回転する場合において掘削用ビットとして機能し得るように構成された１つ又は複数のコマ部（突状部）と、を備える、鋼管径変換リングを提示する。 In one embodiment of the present invention, a steel pipe diameter conversion ring, a first steel pipe receiving end having a first outer diameter configured to be engageable with an inner peripheral side of a steel pipe having a relatively small inner diameter. Portion, a second steel pipe receiving end portion having a second outer diameter configured to be engageable with the inner peripheral side of a steel pipe having a relatively large inner diameter, and a first outer diameter to a second outer diameter And one or a plurality of top portions (protruding portions) that are provided so as to project from the outer surface in the course of expanding to the point where the steel pipe diameter conversion ring can function as an excavating bit when the steel pipe diameter conversion ring rotates. , A steel pipe diameter conversion ring is provided.

本発明の他の実施例においては、鋼管径変換リングであって、相対的に小さい内径を有する鋼管の内周側と係合可能に構成された第１の外径を有する第１の鋼管受け端部、及び相対的に大きい内径を有する鋼管の内周側と係合可能に構成された第２の外径を有する第２の鋼管受け端部と、第１の鋼管受け端部及び第２の鋼管受け端部に設けられ、相対的に大きい内径を有する鋼管の中心軸と相対的に小さい内径を有する鋼管の中心軸とを同心状に位置決めすることができるように構成されたガイドリブと、第１の外径から第２の外径まで拡大する途中の外面から突出するように設けられ、該鋼管径変換リングが軸回転する場合において掘削用ビットとして機能し得るように構成された１つ又は複数のコマ部と、を備える、鋼管径変換リングを提示する。 According to another embodiment of the present invention, a steel pipe diameter conversion ring having a first outer diameter configured to be engageable with an inner peripheral side of a steel pipe having a relatively small inner diameter. An end portion, a second steel pipe receiving end portion having a second outer diameter configured to be engageable with an inner peripheral side of a steel pipe having a relatively large inner diameter, a first steel pipe receiving end portion, and a second steel pipe receiving end portion. A guide rib which is provided at the steel pipe receiving end portion and is configured to be able to concentrically position the central axis of the steel pipe having a relatively large inner diameter and the central axis of the steel pipe having a relatively small inner diameter, One that is provided so as to project from the outer surface in the middle of expanding from the first outer diameter to the second outer diameter, and that can function as an excavating bit when the steel pipe diameter conversion ring rotates axially Or, a steel pipe diameter conversion ring including a plurality of top parts is presented.

本発明の他の実施例においては、鋼管径変換リングであって、相対的に小さい内径を有する鋼管の内周側と係合可能に構成された第１の外径を有する第１の鋼管受け端部、及び相対的に大きい内径を有する鋼管の内周側と係合可能に構成された第２の外径を有する第２の鋼管受け端部と、第１の外径から第２の外径まで拡大する途中の外面から突出するように設けられ、該鋼管径変換リングが軸回転する場合において掘削用ビットとして機能し得るように構成された１つ又は複数のコマ部と、を備え、第１の鋼管受け端部は、相対的に小さい内径と相対的に大きい内径との間の大きさの内径を有する鋼管の内周側と係合可能に構成された第３の外径をさらに有する（すなわち、互いに外径の異なる段部が第１の鋼管受け端部に形成されている）ことを特徴とする、管接続用リングを提示する。 According to another embodiment of the present invention, a steel pipe diameter conversion ring having a first outer diameter configured to be engageable with an inner peripheral side of a steel pipe having a relatively small inner diameter. A second steel pipe receiving end portion having a second outer diameter configured to be engageable with an end portion and an inner peripheral side of a steel pipe having a relatively large inner diameter; and a first outer diameter to a second outer diameter One or a plurality of pieces provided so as to project from the outer surface in the middle of expanding to the diameter and configured to function as an excavating bit when the steel pipe diameter conversion ring is axially rotated, The first steel pipe receiving end further has a third outer diameter configured to be engageable with the inner peripheral side of the steel pipe having an inner diameter of a size between a relatively small inner diameter and a relatively large inner diameter. The present invention provides a pipe connecting ring, which is characterized by having (that is, step portions having different outer diameters from each other are formed on the first steel pipe receiving end portion).

本発明のさらに他の実施例においては、鋼管径変換リングであって、相対的に小さい内径を有する鋼管の内周側と係合可能に構成された第１の外径を有する第１の鋼管受け端部、及び相対的に大きい内径を有する鋼管の内周側と係合可能に構成された第２の外径を有する第２の鋼管受け端部と、第１の鋼管受け端部及び第２の鋼管受け端部に設けられ、相対的に大きい内径を有する鋼管の中心軸と相対的に小さい内径を有する鋼管の中心軸とを同心状に位置決めすることができるように構成されたガイドリブと、第１の外径から第２の外径まで拡大する途中の外面から突出するように設けられ、該鋼管径変換リングが軸回転する場合において掘削用ビットとして機能し得るように構成された１つ又は複数のコマ部と、を備え、第１の鋼管受け端部は、相対的に小さい内径と相対的に大きい内径との間の大きさの内径を有する鋼管の内周側と係合可能に構成された第３の外径をさらに有する（すなわち、互いに外径の異なる段部が第１の鋼管受け端部に形成されている）ことを特徴とする、鋼管径変換リングを提示する。 In still another embodiment of the present invention, a steel pipe diameter conversion ring having a first outer diameter configured to be engageable with an inner peripheral side of a steel pipe having a relatively small inner diameter. A receiving end portion, a second steel pipe receiving end portion having a second outer diameter configured to be engageable with an inner peripheral side of a steel pipe having a relatively large inner diameter, a first steel pipe receiving end portion, and a first steel pipe receiving end portion And a guide rib which is provided at the steel pipe receiving end portion of the second pipe and is configured to be capable of concentrically positioning the central axis of the steel pipe having a relatively large inner diameter and the central axis of the steel pipe having a relatively small inner diameter. , Provided so as to protrude from the outer surface in the middle of expanding from the first outer diameter to the second outer diameter, and configured to function as an excavating bit when the steel pipe diameter conversion ring rotates axially 1 One or a plurality of pieces, and the first steel pipe receiving end is engageable with the inner peripheral side of the steel pipe having an inner diameter between a relatively small inner diameter and a relatively large inner diameter. The present invention provides a steel pipe diameter conversion ring, which further has a third outer diameter configured in (i.e., step portions having different outer diameters are formed on the first steel pipe receiving end portion).

本発明に係る鋼管径変換リングは、長手方向に目的に合った外径や肉厚の異なる鋼管を溶接接続できる構造である。例えば図２に示されるように、上部構造物から水平力や曲げモーメントの作用する杭頭近傍部分では、外径が大きく肉厚も厚い断面係数の大きい鋼管を使用し、杭先端部から４Ｄ（Ｄ：鋼管直径または先端刃先直径）以上までは、先端刃先径に適用した鋼管を使用し、その他の部分では、外径の小さな鋼管を使用する。また一つの鋼管径変換リング上で複数の小径鋼管の選択を可能にし、鋼管肉厚の制約もないことなどから、鋼管杭や杭状地盤補強体として使われる鋼管の材料コストの削減できる。また、掘削用ビットとして機能し得るように構成されたコマ部（以下、「掘削コマ」という。）の効果により作業時間のロスを抑えることができる。 The steel pipe diameter conversion ring according to the present invention has a structure capable of welding and connecting steel pipes having different outer diameters and wall thicknesses suitable for the purpose in the longitudinal direction. For example, as shown in FIG. 2, in the vicinity of the pile head where horizontal force or bending moment acts from the upper structure, a steel pipe having a large outer diameter and a large wall thickness and a large section modulus is used, and 4D from the tip of the pile ( (D: Steel pipe diameter or tip blade tip diameter) The steel pipe applied to the tip blade tip diameter is used up to and above, and the steel pipe having a small outer diameter is used in other portions. Further, since it is possible to select a plurality of small diameter steel pipes on one steel pipe diameter conversion ring and there is no restriction on the wall thickness of the steel pipe, the material cost of the steel pipes used as steel pipe piles or pile-like ground reinforcements can be reduced. In addition, it is possible to suppress the loss of working time due to the effect of the top portion (hereinafter referred to as “excavation piece”) configured to function as an excavation bit.

また、互いに肉厚の異なる複数の鋼管を同軸にするためのセンタリング用のガイドリブが形成されているため、異径鋼管を溶接するときに生ずることの多い、異径鋼管同士の中心軸ずれも生じにくく容易に溶接できるため施工時間の短縮を図ることもできる。 Further, since centering guide ribs are formed to coaxially align a plurality of steel pipes having different wall thicknesses, center axis misalignment between different diameter steel pipes often occurs when welding different diameter steel pipes. Since it is difficult and easy to weld, the construction time can be shortened.

鋼管径変換リングに小径鋼管と大径鋼管を溶接したときを示す側面図。The side view which shows the time when the small diameter steel pipe and the large diameter steel pipe were welded to the steel pipe diameter conversion ring. 小径鋼管と大径鋼管が溶接された（ａ）鋼管径変換リングの断面、及び（ｂ）掘削コマ付き鋼管径変換リングの断面を示す図。The figure which shows the cross section of the (a) steel pipe diameter conversion ring which the small diameter steel pipe and the large diameter steel pipe were welded, and (b) the steel pipe diameter conversion ring with an excavation piece. 鋼管径変換リングの小径端部と大径端部に加工されたセンタリング用ガイドリブを示す側面図。The side view which shows the centering guide rib processed into the small diameter end part and large diameter end part of a steel pipe diameter conversion ring. 掘削コマＫ１，Ｋ２が組み込まれた鋼管径変換リングを示す図。The figure which shows the steel pipe diameter conversion ring with which the drilling pieces K1 and K2 were incorporated. 鋼管杭や杭状地盤補強体に鋼管径変換リングが適用された実施例を示す図。The figure which shows the Example which applied the steel pipe diameter conversion ring to the steel pipe pile or pile-shaped ground reinforcement body.

図１〜図５を参照しつつ、本発明の鋼管径変換リング１を使用した実施形態例を説明する。 An example of an embodiment using the steel pipe diameter conversion ring 1 of the present invention will be described with reference to FIGS.

図１は、鋼管径変換リングＲ１１に鋼管杭や杭状地盤補強体として使われる先端刃先に対応した鋼管径の鋼管Ｐ１２を鋼管径変換リングの大端部に溶接し、小端部の最小径センタリング用のガイドリブ上に小径鋼管Ｐ１１を溶接した場合を示す側面図である。図２は、図１の断面図である。Ｙ２１は小径鋼管の溶接断面を示し、Ｙ２２は大径鋼管の溶接断面を示す。一実施例においては、溶接する鋼管の外径及び肉厚に左右されない溶接開先を有している。 Fig. 1 shows that the steel pipe diameter conversion ring R11 is welded to the large end of the steel pipe diameter conversion ring by welding a steel pipe P12 having a steel pipe diameter corresponding to the tip edge used as a steel pipe pile or a pile-like ground reinforcement, to the minimum diameter of the small end. It is a side view which shows the case where the small diameter steel pipe P11 is welded on the guide rib for centering. FIG. 2 is a sectional view of FIG. Y21 shows the welding cross section of a small diameter steel pipe, and Y22 shows the welding cross section of a large diameter steel pipe. In one embodiment, the welding groove is independent of the outer diameter and wall thickness of the steel pipe to be welded.

図１及び図２では、小径鋼管を上部に大径鋼管を下部に溶接した例であるが鋼管径変換リング１は上下反転して使用できる機能を有しているので、大径鋼管を上部に小径鋼管を下部に溶接して使用することも可能である。溶接は工場内での溶接を基本としているが、中心軸ずれを防止するセンタリング用ガイドリブが形成されているので、現場溶接も容易に可能である。また、鋼管径変換リング１は、使用する鋼管と同等の機械的性能を持つ鋳鋼部材である。 1 and 2 show an example in which a small-diameter steel pipe is welded to the upper part and a large-diameter steel pipe is welded to the lower part, but the steel pipe diameter conversion ring 1 has a function that can be used upside down. It is also possible to weld a small-diameter steel pipe to the lower part for use. Welding is basically done in a factory, but since centering guide ribs are formed to prevent center axis deviation, on-site welding is also possible. The steel pipe diameter conversion ring 1 is a cast steel member having the same mechanical performance as the steel pipe used.

図３は、鋼管径変換リング１の小径端部と大径端部に加工されたセンタリング用ガイドリブを示す。Ｓ１は最小径鋼管を受けて溶接する部位（鋼管受け端部）であり、使用する鋼管の肉厚毎にガイドリブが加工されている。Ｓ２は中径鋼管（上記相対的に小さい内径と相対的に大きい内径との間の大きさの内径を有する鋼管）を受けて溶接する部位（鋼管受け端部）であり、Ｓ３は大径鋼管を受けて溶接する部位（鋼管受け端部）であり、いずれも使用する鋼管肉厚に対応するガイドリブが加工されている。 FIG. 3 shows the centering guide ribs formed on the small diameter end and the large diameter end of the steel pipe diameter conversion ring 1. S1 is a portion (steel pipe receiving end) where the minimum diameter steel pipe is received and welded, and the guide rib is processed for each wall thickness of the steel pipe to be used. S2 is a medium-diameter steel pipe (a steel pipe having an inner diameter between the relatively small inner diameter and the relatively large inner diameter) and is welded (steel pipe receiving end), and S3 is a large-diameter steel pipe. It is a portion (steel pipe receiving end) that receives and welds, and in each case, a guide rib corresponding to the thickness of the steel pipe to be used is processed.

図４は、図３に示した鋼管径変換リング１に２つの掘削コマＫ１，Ｋ２が組み込まれた鋼管径変換リングを示す。一実施例においては、掘削コマＫ１，Ｋ２は、掘削用ビットとして機能し得るように、鋭利な部分（鋭角ないし直角を有する部分）を有する角柱形の形状に形成されている。また一実施例においては、掘削コマＫ１，Ｋ２は、鋼管径変換リング１の他の部分と一体的に成形されたものであり、概ね角柱形の一部の形状に形成されている。他の実施例においては、掘削用ビットとして機能し得るように、掘削コマＫ１，Ｋ２は、金属やセラミック等の硬質な材料から形成されている。さらなる実施例においては、鋼管径変換リング１の表面特には掘削コマＫ１，Ｋ２の表面に付着する土壌を少なくして掘削能力を維持するために、掘削コマＫ１，Ｋ２の表面にシリコーン樹脂加工が施されている。 FIG. 4 shows a steel pipe diameter conversion ring in which two excavation pieces K1 and K2 are incorporated in the steel pipe diameter conversion ring 1 shown in FIG. In one embodiment, the drilling pieces K1 and K2 are formed in a prismatic shape having a sharp portion (a portion having an acute angle or a right angle) so as to function as a drill bit. Further, in one embodiment, the drilling pieces K1 and K2 are integrally formed with the other portion of the steel pipe diameter conversion ring 1 and are formed in a substantially prismatic shape. In another embodiment, the drilling pieces K1, K2 are made of a hard material such as metal or ceramic so as to function as a drilling bit. In a further embodiment, in order to maintain the excavation ability by reducing the amount of soil adhered to the surface of the steel pipe diameter conversion ring 1, particularly the surface of the drilling pieces K1 and K2, the surface of the drilling pieces K1 and K2 is treated with a silicone resin. It has been subjected.

図５は、鋼管杭や杭状地盤補強体の全体イメージＬ１を示す。上端部分Ｌ２の鋼管Ｐ４１は、上部構造物からの水平力や曲げモーメントに対応するため十分な断面係数を有する鋼管が使用され鋼管径変換リングの大径端部を上にして（Ｒ４１）、溶接Ｙ４１されている。なお、小径端部には小径鋼管Ｐ４２が溶接Ｙ４２されている。 FIG. 5 shows an overall image L1 of a steel pipe pile or a pile-shaped ground reinforcement. As the steel pipe P41 of the upper end portion L2, a steel pipe having a sufficient section modulus is used in order to cope with a horizontal force and a bending moment from the upper structure, and the large diameter end of the steel pipe diameter conversion ring is turned up (R41) and welded. It is Y41. A small-diameter steel pipe P42 is welded Y42 to the small-diameter end portion.

下端部分Ｌ３部分は、鋼管杭や杭状地盤補強体の先端極限支持力に影響する部位であり、先端刃先には、先端刃先径に適用した鋼管Ｐ４３が溶接Ｙ４５され、先端刃先外径の４倍以上の位置からは材料コスト低減のため鋼管径変換リングの大径端部を下にして（Ｒ４２）、溶接Ｙ４４し、小径端部の最小径部位に小径鋼管Ｐ４２を溶接Ｙ４３した実施例である。 The lower end portion L3 is a portion that influences the ultimate support force of the tip of the steel pipe pile or the pile-shaped ground reinforcement, and the tip pipe edge is welded Y45 to the steel pipe P43 applied to the tip blade tip diameter to obtain the outer diameter of the tip blade tip of 4 In an embodiment in which the large diameter end of the steel pipe diameter conversion ring is placed downward (R42) and welded Y44 from a position more than twice as large as the material cost reduction, and the small diameter steel pipe P42 is welded Y43 to the smallest diameter portion of the small diameter end. is there.

１…鋼管径変換リング
Ｐ１１…鋼管径変換リング溶接された小径鋼管
Ｒ１１…鋼管径変換リングの側面
Ｐ１２…鋼管径変換リング溶接された大径鋼管
Ｄ１…小径鋼管の外径
Ｄ２…小径鋼管の内径
Ｄ３…大径鋼管の外径
Ｄ４…大径鋼管の内径
Ｙ２１…鋼管径変換リングと小径鋼管の溶接部
Ｒ２１…鋼管径変換リングの断面
Ｙ２２…鋼管径変換リングと大径鋼管の溶接部
Ｓ１…鋼管径変換リングの小径端部側の最小径鋼管径変換センタリング用ガイドリブ側面
Ｓ２…鋼管径変換リングの小径端部側の中径鋼管径変換センタリング用ガイドリブ側面
Ｓ３…鋼管径変換リングの大径端部側の大径鋼管径変換センタリング用ガイドリブ側面
Ｌ１…鋼管杭や杭状地盤補強体の全体イメージ
Ｌ２…鋼管杭や杭状地盤補強体の杭頭近傍イメージ
Ｌ３…鋼管杭や杭状地盤補強体の先端刃先近傍イメージ
Ｐ４１…鋼管杭や杭状地盤補強体の杭頭近傍での断面係数の大きい鋼管
Ｐ４２…鋼管杭や杭状地盤補強体の小径鋼管
Ｐ４３…鋼管杭や杭状地盤補強体の先端刃先の適用径鋼管
Ｙ４１…鋼管径変換リングの大径端部を上向きにして大径鋼管と溶接した溶接部
Ｒ４１…鋼管径変換リングの大径端部を上向きに使用した実施例
Ｙ４２…鋼管径変換リングの大径端部を上向きにして小径鋼管と溶接した溶接部
Ｙ４３…鋼管径変換リングの大径端部を下向きにして小径鋼管と溶接した溶接部
Ｒ４２…鋼管径変換リングの大径端部を下向きに使用した実施例
Ｙ４４…鋼管径変換リングの大径端部を下向きにして先端刃先の適用径鋼管と溶接した溶接部
Ｙ４５…先端刃先と先端刃先の適用径鋼管と溶接した溶接部
Ｋ１…掘削コマ
Ｋ２…掘削コマ

1... Steel pipe diameter conversion ring P11... Steel pipe diameter conversion ring Welded small diameter steel pipe R11... Side surface of steel pipe diameter conversion ring P12... Steel pipe diameter conversion ring Welded large diameter steel pipe D1... Small diameter steel pipe outer diameter D2... Small diameter steel pipe inner diameter D3... Outer diameter of large diameter steel pipe D4... Inner diameter of large diameter steel pipe Y21... Welding portion of steel pipe diameter converting ring and small diameter steel pipe R21... Cross section Y22 of steel pipe diameter converting ring... Welding portion S1 of steel pipe diameter converting ring and large diameter steel pipe... Smallest diameter on the small diameter end side of the steel pipe diameter converting ring Side for guiding steel pipe diameter converting center S2... Medium diameter steel pipe diameter converting ring for the small diameter end side Guide rib side for centering steel pipe diameter converting S3... Large diameter end of the steel pipe diameter converting ring Side of large-diameter steel pipe diameter conversion centering on the side of the side L1... Overall image of steel pipe pile or pile-like ground reinforcement L2... Image near the pile head of steel pipe pile or pile-like ground reinforcement L3... Steel pipe pile or pile-like ground reinforcement Near the tip of the blade edge P41... Steel pipe P42 or steel pipe with a large section modulus near the pile head of pile-like ground reinforcement P42... Small diameter steel pipe P43 of steel pipe pile or pile-like ground reinforcement P43... Steel pipe pile or pile-like ground reinforcement Applicable diameter of the tip blade edge Steel pipe Y41... Welded portion welded to large diameter steel pipe with large diameter end of steel pipe diameter conversion ring facing upward R41... Example using large diameter end of steel pipe diameter conversion ring facing upward Y42... Steel pipe Welding part Y43 welded with a small diameter steel pipe with the large diameter end of the diameter converting ring facing upwards... Welding part R42 welding a small diameter steel pipe with the large diameter end of the steel pipe diameter converting ring facing down... Large diameter of the steel pipe diameter converting ring Example Y44 with end portion used downward... Large diameter of steel pipe diameter conversion ring Welded portion with end portion facing downward and welded with applicable diameter steel pipe for tip cutting edge Y45... Welding with tip diameter and applicable diameter steel pipe for tip cutting edge welded Part K1... Drilling piece K2... Drilling piece

Claims (5)

鋼管径変換リングであって、
相対的に小さい内径を有する鋼管の内周側と係合可能に構成された第１の外径を有する第１の鋼管受け端部、及び相対的に大きい内径を有する鋼管の内周側と係合可能に構成された第２の外径を有する第２の鋼管受け端部と、
第１の外径から第２の外径まで拡大する途中の外面から突出するように設けられ、該鋼管径変換リングが軸回転する場合において掘削用ビットとして機能し得るように構成された１つ又は複数のコマ部と、
を備える、鋼管径変換リング。 A steel pipe diameter conversion ring,
A first steel pipe receiving end portion having a first outer diameter configured to be engageable with an inner peripheral side of a steel pipe having a relatively small inner diameter, and an inner peripheral side of a steel pipe having a relatively large inner diameter. A second steel pipe receiving end having a second outer diameter configured to be matable;
One that is provided so as to project from the outer surface in the middle of expanding from the first outer diameter to the second outer diameter, and that can function as an excavating bit when the steel pipe diameter conversion ring rotates axially Or with multiple pieces,
A steel pipe diameter conversion ring equipped with. 鋼管径変換リングであって、
相対的に小さい内径を有する鋼管の内周側と係合可能に構成された第１の外径を有する第１の鋼管受け端部、及び相対的に大きい内径を有する鋼管の内周側と係合可能に構成された第２の外径を有する第２の鋼管受け端部と、
第１の鋼管受け端部及び第２の鋼管受け端部に設けられ、相対的に大きい内径を有する鋼管の中心軸と相対的に小さい内径を有する鋼管の中心軸とを同心状に位置決めすることができるように構成されたガイドリブと、
第１の外径から第２の外径まで拡大する途中の外面から突出するように設けられ、該鋼管径変換リングが軸回転する場合において掘削用ビットとして機能し得るように構成された１つ又は複数のコマ部と、
を備える、鋼管径変換リング。 A steel pipe diameter conversion ring,
A first steel pipe receiving end portion having a first outer diameter configured to be engageable with an inner peripheral side of a steel pipe having a relatively small inner diameter, and an inner peripheral side of a steel pipe having a relatively large inner diameter. A second steel pipe receiving end having a second outer diameter configured to be matable;
Positioning the central axis of a steel pipe having a relatively large inner diameter and the central axis of a steel pipe having a relatively small inner diameter, which are provided at the first steel pipe receiving end and the second steel pipe receiving end, and are concentrically positioned. And a guide rib configured so that
One that is provided so as to project from the outer surface in the middle of expanding from the first outer diameter to the second outer diameter, and that can function as an excavating bit when the steel pipe diameter conversion ring rotates axially Or with multiple pieces,
A steel pipe diameter conversion ring equipped with. 鋼管径変換リングであって、
相対的に小さい内径を有する鋼管の内周側と係合可能に構成された第１の外径を有する第１の鋼管受け端部、及び相対的に大きい内径を有する鋼管の内周側と係合可能に構成された第２の外径を有する第２の鋼管受け端部と、
第１の外径から第２の外径まで拡大する途中の外面から突出するように設けられ、該鋼管径変換リングが軸回転する場合において掘削用ビットとして機能し得るように構成された１つ又は複数のコマ部と、
を備え、
第１の鋼管受け端部は、上記相対的に小さい内径と相対的に大きい内径との間の大きさの内径を有する鋼管の内周側と係合可能に構成された第３の外径をさらに有することを特徴とする、鋼管径変換リング。 A steel pipe diameter conversion ring,
A first steel pipe receiving end portion having a first outer diameter configured to be engageable with an inner peripheral side of a steel pipe having a relatively small inner diameter, and an inner peripheral side of a steel pipe having a relatively large inner diameter. A second steel pipe receiving end having a second outer diameter configured to be matable;
One that is provided so as to project from the outer surface in the middle of expanding from the first outer diameter to the second outer diameter, and that can function as an excavating bit when the steel pipe diameter conversion ring rotates axially Or with multiple pieces,
Equipped with
The first steel pipe receiving end portion has a third outer diameter configured to be engageable with the inner peripheral side of the steel pipe having an inner diameter between the relatively small inner diameter and the relatively large inner diameter. A steel pipe diameter conversion ring characterized by further having. 鋼管径変換リングであって、
相対的に小さい内径を有する鋼管の内周側と係合可能に構成された第１の外径を有する第１の鋼管受け端部、及び相対的に大きい内径を有する鋼管の内周側と係合可能に構成された第２の外径を有する第２の鋼管受け端部と、
第１の鋼管受け端部及び第２の鋼管受け端部に設けられ、相対的に大きい内径を有する鋼管の中心軸と相対的に小さい内径を有する鋼管の中心軸とを同心状に位置決めすることができるように構成されたガイドリブと、
第１の外径から第２の外径まで拡大する途中の外面から突出するように設けられ、該鋼管径変換リングが軸回転する場合において掘削用ビットとして機能し得るように構成された１つ又は複数のコマ部と、
を備え、
第１の鋼管受け端部は、上記相対的に小さい内径と相対的に大きい内径との間の大きさの内径を有する鋼管の内周側と係合可能に構成された第３の外径をさらに有することを特徴とする、鋼管径変換リング。 A steel pipe diameter conversion ring,
A first steel pipe receiving end portion having a first outer diameter configured to be engageable with an inner peripheral side of a steel pipe having a relatively small inner diameter, and an inner peripheral side of a steel pipe having a relatively large inner diameter. A second steel pipe receiving end having a second outer diameter configured to be matable;
Positioning the central axis of a steel pipe having a relatively large inner diameter and the central axis of a steel pipe having a relatively small inner diameter, which are provided at the first steel pipe receiving end and the second steel pipe receiving end, and are concentrically positioned. And a guide rib configured so that
One that is provided so as to project from the outer surface in the middle of expanding from the first outer diameter to the second outer diameter, and that can function as an excavating bit when the steel pipe diameter conversion ring rotates axially Or with multiple pieces,
Equipped with
The first steel pipe receiving end portion has a third outer diameter configured to be engageable with the inner peripheral side of the steel pipe having an inner diameter between the relatively small inner diameter and the relatively large inner diameter. A steel pipe diameter conversion ring characterized by further having. 上記１つ又は複数のコマ部は、該鋼管径変換リングの他の部分と一体的に成形されたものであり、概ね角柱形の一部の形状に形成されていることを特徴とする、請求項１〜４のいずれかに記載の鋼管径変換リング。

The one or more top parts are integrally formed with other parts of the steel pipe diameter conversion ring, and are formed in a part of a substantially prismatic shape. Item 5. The steel pipe diameter conversion ring according to any one of Items 1 to 4.

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002275888A (en) * 2001-03-12 2002-09-25 Asahi Kasei Corp Pile joint structure
JP2002302940A (en) * 2001-04-09 2002-10-18 Norio Moriya Connection structure for foundation pile
JP2005003029A (en) * 2003-06-10 2005-01-06 Hiraoka Kinzoku Kogyo Kk Joint structure for tube body
JP2016217107A (en) * 2015-05-21 2016-12-22 次男 板垣 Steel pipe diameter change ring

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002275888A (en) * 2001-03-12 2002-09-25 Asahi Kasei Corp Pile joint structure
JP2002302940A (en) * 2001-04-09 2002-10-18 Norio Moriya Connection structure for foundation pile
JP2005003029A (en) * 2003-06-10 2005-01-06 Hiraoka Kinzoku Kogyo Kk Joint structure for tube body
JP2016217107A (en) * 2015-05-21 2016-12-22 次男 板垣 Steel pipe diameter change ring

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